02189nas a2200229   4500008004100000022001400041245010800055210006900163260010600232300001400338490000700352520131000359653002501669653001901694653002201713100002001735700001901755700001901774700002001793700001801813856012801831       2008                        eng d  a0025-540800aPhotocatalytic decomposition of methylene nanocrystalline titania prepared by different blue on methods0 aPhotocatalytic decomposition of methylene nanocrystalline titani  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcMAY  a1145-11520 v433 a<p>Nanocrystalline particles of pure anatase titania were prepared by two different methods. One is the sol-gel method at ambient temperature using ultrasonication (TiO2-SG-US) and conventional stirring method (TiO2-SG-S) and the other by surfactant assisted hydrothermal synthesis (TiO2-HT). More uniform distribution/dispersion of the nanoparticles (SEM), marginally higher surface area, better thermal stability and phase purity are some of the advantages of preparation of nanocrystalline titania by sol gel ultrasonication method and hydrothermal synthesis method. The behavior of anatase titania in photocatalytic decomposition of methylene blue in aqueous medium was studied as a function of the method of preparation and the crystallite size. The nanoparticles prepared by ultrasonication method were more effective than both, the sample prepared by conventional stirring method and commercial Degussa P-25. The higher photocatalytic activity of TiO2-SG-US is attributed to the more uniform size of the particles as compared to TiO2-SG-S samples. Both TEM and XRD data on TiO2-HT samples reveal a uniform and nanocrystalline TiO2 particles, which showed photocatalytic activity in both UV and visible region although brookite phase was also present. (C) 2007 Elsevier Ltd. All rights reserved.</p>10aCatalytic properties10aNanostructures10aSol-gel chemistry1 aRamaswamy, Veda1 aJagtap, Neelam1 aVijayanand, S.1 aBhange, Deu, S.1 aAwati, Preeti  uhttps://library.ncl.res.in/content/photocatalytic-decomposition-methylene-nanocrystalline-titania-prepared-different-blue-001406nas a2200253   4500008004100000022001400041245010000055210006900155260010600224300001400330490000700344520045900351653002500810653001900835653001100854653002200865653002200887100002200909700002700931700002000958700002500978700002901003856012001032       2010                        eng d  a0025-540800aSurface texture and specific adsorption sites of sol-gel synthesized anatase TiO2 nanoparticles0 aSurface texture and specific adsorption sites of solgel synthesi  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcOCT  a1470-14750 v453 a<p>The surface properties of sot-gel synthesized anatase titania (TiO2) nanoparticles are probed by sorptiometry, infrared absorption spectroscopy, UV-vis diffuse reflectance spectroscopy and high resolution transmission electron microscopy. The results reveal strong correlations of the surface area, porosity, pyridine adsorption capacity and strength, and catalytic methylbutynol decomposition activity. (C) 2010 Elsevier Ltd. All rights reserved.</p>10aCatalytic properties10aNanostructures10aOxides10aSol-gel chemistry10aX-ray diffraction1 aZaki, Mohamed, I.1 aMekhemer, Gamal, A. H.1 aFouad, Nasr, E.1 aJagadale, Tushar, C.1 aOgale, Satishchandra, B.  uhttps://library.ncl.res.in/content/surface-texture-and-specific-adsorption-sites-sol-gel-synthesized-anatase-tio2-001991nas a2200229   4500008004100000022001400041245011500055210006900170260010600239300001200345490000700357520109500364653002501459653001201484653001901496653002301515653001801538100002801556700002201584700002501606856013001631       2011                        eng d  a0025-540800aLow temperature pH dependent synthesis of flower-like ZnO nanostructures with enhanced photocatalytic activity0 aLow temperature pH dependent synthesis of flowerlike ZnO nanostr  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcMAY  a771-7780 v463 a<p>In the present study we have synthesized flower-like ZnO nanostructures comprising of nanobelts of 20 nm width by template and surfactant free low-temperature (4 degrees C) aqueous solution route. The ZnO nanostructures exhibit flower-like morphology, having crystalline hexagonal wurtzite structure with (001) orientation. The flowers with size between 600 and 700 nm consist of ZnO units having crystallite size of similar to 40 nm. Chemical and structural characterization reveals a significant role of precursor: ligand molar ratio, pH, and temperature in the formation of single-step flower-like ZnO at low temperature. Plausible growth mechanism for the formation of flower-like structure has been discussed in detail. Photoluminescence studies confirm formation of ZnO with the defects in crystal structure. The flower-like ZnO nanostructures exhibit enhanced photochemical degradation of methylene blue (MB) with the increased concentration of ligand, indicating attribution of structural features in the photocatalytic properties. (C) 2010 Elsevier Ltd. All rights reserved.</p>10aCatalytic properties10aDefects10aNanostructures10aOptical properties10aSemiconductor1 aVaishampayan, Mukta, V.1 aMulla, Imtiaz, S.1 aJoshi, Satyawati, S.  uhttps://library.ncl.res.in/content/low-temperature-ph-dependent-synthesis-flower-zno-nanostructures-enhanced-photocatalytic-002057nas a2200265   4500008004100000022001400041245010400055210006900159260010600228300001200334490000700346520107400353653002501427653002301452653001101475653002201486100002501508700002001533700002601553700002201579700001801601700002501619700002101644856012601665       2011                        eng d  a0025-540800aNovel solar light driven photocatalyst, zinc indium vanadate for photodegradation of aqueous phenol0 aNovel solar light driven photocatalyst zinc indium vanadate for   aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcMAY  a635-6380 v463 a<p>In the present investigation, we have demonstrated the synthesis of novel photocatalyst, zinc indium vanadate (ZIV) by solid solid state route using respective oxides of zinc, indium and vanadium. This novel photocatalyst was characterized using XRD, FESEM, UV-DRS and FTIR in order to investigate its structural, morphological and optical properties. XRD clearly shows the formation of phase pure ZIV of triclinic crystal structure with good crystallinity. FESEM micrographs showed the clustered morphology having particle size between 0.5 and 1 mu m. Since, optical study showed the band gap around 2.8 eV, i.e. in visible region, we have performed the photocatalytic activity of phenol degradation under visible light irradiation. The photodecomposition of phenol by ZIV is studied for the first time and an excellent photocatalytic activity was obtained using this novel photocatalyst. Considering the band gap of zinc indium vanadate in visible region, it will also be the potential candidate for water splitting. (C) 2011 Elsevier Ltd. All rights reserved.</p>10aCatalytic properties10aChemical synthesis10aOxides10aX-ray diffraction1 aMahapure, Sonali, A.1 aRane, Vilas, H.1 aAmbekar, Jalindar, D.1 aNikam, Latesh, K.1 aMarimuthu, R.1 aKulkarni, Milind, V.1 aKale, Bharat, B.  uhttps://library.ncl.res.in/content/novel-solar-light-driven-photocatalyst-zinc-indium-vanadate-photodegradation-aqueous-002032nas a2200217   4500008004100000022001400041245013700055210006900192260010600261300001400367490000700381520115400388653002501542653002301567653002401590653001501614653001901629100002101648700001801669856012701687       2012                        eng d  a0025-540800aEffects of grain morphology, microstructure and dispersed metal cocatalyst on the photoreduction of water over impurity-doped LaInO30 aEffects of grain morphology microstructure and dispersed metal c  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcMAY  a1217-12280 v473 a<p>The single phase lanthanum indates doped with Ga (for La) and N (for O), i.e. La1-xGaxInO3 (0 &lt;= x &lt;= 0.2) and LaInO1-yNy (y similar to 0.6), exhibit significant activity for photoreduction of water; the yield of H-2 produced depending on dopant, excitation source, and addition of a sacrificial reagent. The two-step H-2 evolution observed for this reaction corresponds with the two distinct absorbance regimes displayed by these materials, one in UV-region due to bandgap excitation and the other in visible region arising from the transitions involving sub-bandgap donor or acceptor energy states. The photocatalytic activity of these d(10) metal oxides increases on coating with a metal/metal oxide co-catalyst, gold exhibiting superior activity to Pt and NiO, irrespective of excitation source and sample composition. The preparation-controlled particle morphology, doping-induced lattice imperfections, and metal/semiconductor hetero-junctions are envisaged to play a key role in the absorption characteristics and photocatalytic water reduction activity of metal/LaInO3 nanocomposites. (C) 2012 Elsevier Ltd. All rights reserved.</p>10aCatalytic properties10aChemical synthesis10aElectron microscopy10aInterfaces10aSemiconductors1 aDhanasekaran, P.1 aGupta, N., M.  uhttps://library.ncl.res.in/content/effects-grain-morphology-microstructure-and-dispersed-metal-cocatalyst-photoreduction-001908nas a2200241   4500008004100000022001400041245012400055210006900179260010600248300001200354490000700366520098500373653002501358653001501383653001901398653002201417100001901439700001801458700002701476700001901503700002001522856012401542       2016                        eng d  a0025-540800aPhotocatalytic degradation of methylene blue on Sn-doped titania nanoparticles synthesized by solution combustion route0 aPhotocatalytic degradation of methylene blue on Sndoped titania   aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcAPR  a264-2720 v763 a<p>Series of tin-doped titania nanoparticles with varying tin content in the range 0-20 mol% have been prepared by solution combustion synthesis route using urea as a fuel. The structure, surface morphology and optical activity of Sn-doped TiO2 nanoparticles were investigated by various analytical techniques such as powder XRD, SEM, TEM, UV-vis and N-2 adsorption study. The crystalline structures of the various phases were studied by rietveld refinement of the XRD data. The photocatalytic performance of Sn-doped titania nanoparticles were tested for degradation of MB under UV and visible light irradiation. The results reveal that the photocatalytic activity increases with increase in tin content which may be due to decrease in crystallite size with increase in surface area. The doping of Sn into TiO2 lattice hinders the recombination of electrons and holes thus enhance the quantum efficiency of photocatalytic reaction. (C) 2015 Elsevier Ltd. All rights reserved.</p>10aCatalytic properties10acomposites10aNanostructures10aX-ray diffraction1 aBhange, P., D.1 aAwate, S., V.1 aGholap, Ramkrishna, S.1 aGokavi, G., S.1 aBhange, Deu, S.  uhttps://library.ncl.res.in/content/photocatalytic-degradation-methylene-blue-sn-doped-titania-nanoparticles-synthesized